Transistor BC159 PNP 20V 100mA

Transistor BC159 PNP, 0.1A TO-18

Transistors

Reference: TRBC159

Part.No: BC159

€0.60

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The BC159 is a silicon PNP low-noise Bipolar Junction Transistor (BJT) in a TO-18 metal can package. Designed for low-noise audio-frequency (AF) input stages and general-purpose small-signal amplification.

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Description
Product Details

BC159 Low-Noise PNP Transistor - Precision AF Input Stages

The BC159 is a silicon PNP transistor specifically characterized for low-noise performance, making it a preferred choice for audio-frequency input stages, microphone preamps and sensitive analog front-ends. Housed in a rugged TO-18 metal can package, it offers good thermal stability alongside its low-noise figure.

Functions & Applications

Low-Noise Design: Specifically characterized for low noise figure, ideal for microphone and audio preamp input stages.
PNP Silicon Construction: Complements NPN designs in push-pull and differential amplifier topologies.
Rugged TO-18 Metal Can: Provides good heat dissipation and mechanical robustness compared to plastic packages.
High hFE: Sufficient current gain (hFE min 120-180 depending on grade) for sensitive small-signal amplification.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	PNP
Package / Case	TO-18
Collector-Base Voltage (Vcbo)	25V
Collector-Emitter Voltage (Vceo)	20V
Max Collector Current (Ic)	100mA
Power Dissipation (Pc)	300mW
Transition Frequency (ft)	100MHz
Mounting Type	Through-Hole (THT)

Frequently Asked Questions

Q: What is the complementary NPN transistor for the BC159?
A: The BC159 belongs to the BC157-159 PNP series, complementary to the BC147-149 NPN series; the closest match is the BC149.

Q: Is the BC159 suitable for audio preamp circuits?
A: Yes, it is specifically characterized for low noise, making it a good choice for microphone and general audio-frequency input stages.

Notes

Legacy/vintage part number (Philips/Mullard/Tesla era, TO-18 metal can); increasingly supplied as NOS stock by some distributors.

Note: Price refers to one (1) piece. The component is shipped in bulk without individual packaging.

Transistor Type: BJT (Bipolar Junction Transistor)
Transistor Polarity / Channel: PNP
Transistor Case Style: TO-18

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